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Method for preparing superhydrophobic polyurethane sponge by biomineralization method

A technology of polyurethane sponge and biomineralization, applied in chemical instruments and methods, and other chemical processes, can solve the problems of expensive raw materials and secondary pollution of the environment, and achieve simple and cheap devices, less environmental pollution, and cheap and easy-to-obtain raw materials Effect

Active Publication Date: 2019-06-04
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the methods for preparing superhydrophobic polyurethane sponges are the synergistic effect of polydopamine and nano-silver particles or fluorosilane modification. These methods have the problems of expensive raw materials or secondary pollution to the environment.

Method used

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  • Method for preparing superhydrophobic polyurethane sponge by biomineralization method
  • Method for preparing superhydrophobic polyurethane sponge by biomineralization method
  • Method for preparing superhydrophobic polyurethane sponge by biomineralization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] First cut the ordinary polyurethane sponge into a 2*2*2cm square, and ultrasonically clean it with ethanol for 30 minutes, then wash it with water three times and then dry it. (i) after drying, soak the sponge in 2mol / LNaOH solution for 10 minutes, take it out and clean it with clear water, (ii) put the polyethyleneimine (PEI) (PEI) and 50mol / L calcium acetate aqueous solution for 30 minutes, then take it out and rinse it with water for 5 times, and then (iii) submerge the sponge in 5g / L polystyrene sodium sulfonate (PSS) solution for 30 minutes. Repeat step (ii) and step (iii) twice and then repeat step (ii) again, finally obtain the sponge whose outer surface is PEI and calcium acetate solution, put this sponge together with ammonium bicarbonate into an airtight container (such as glass desiccator) and placed in an oven set at 30°C for 48 hours. Then take it out and dry it thoroughly, put it into 0.01mol / L palmitic acid / dichloromethane solution and soak it for 24 hou...

Embodiment 2

[0032] First cut the ordinary polyurethane sponge into a 2*2*2cm square, and ultrasonically clean it with ethanol and water for 30 minutes, then wash it with water three times and then dry it. (i) after drying, soak the sponge in 2mol / LNaOH solution for 10 minutes, take it out and clean it with clear water, (ii) put the polyethyleneimine (PEI) (PEI) and 20mol / L calcium acetate aqueous solution for 60 minutes, then take it out and rinse it with water for 5 times, then (iii) submerge the sponge in 2g / L polystyrene sodium sulfonate (PSS) solution with a molecular weight of 70000g / mol 60 minutes. Repeat step (ii) and step (iii) twice and then repeat step (ii) again, finally obtain the sponge whose outer surface is PEI and calcium acetate solution, put this sponge together with ammonium bicarbonate into an airtight container (such as glass desiccator) and placed in an oven set at 30°C for 24 hours. Then take it out and dry it thoroughly, put it into 0.01mol / L lauric acid / dichloro...

Embodiment 3

[0035] First cut the ordinary polyurethane sponge into a 2*2*2cm square, and ultrasonically clean it with ethanol and water for 30 minutes, then wash it with water three times and then dry it. (i) after drying, soak the sponge in 2mol / LNaOH solution for 10 minutes, take it out and clean it with clear water, (ii) put the polyethyleneimine (PEI) (PEI) and 30mol / L calcium acetate aqueous solution for 20 minutes, then take it out and rinse it with water for 3 times, then (iii) submerge the sponge in 3g / L polystyrene sodium sulfonate (PSS) solution with a molecular weight of 70000g / mol 20 minutes. Repeat step (ii) and step (iii) twice and then repeat step (ii) again, finally obtain the sponge whose outer surface is PEI and calcium acetate solution, put this sponge together with ammonium bicarbonate into an airtight container (such as glass desiccator) and placed in an oven set at 40°C for 36 hours. Then take it out and dry it thoroughly, put it in 0.01mol / L hexadecyltrimethoxysil...

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Abstract

The invention relates to a method for preparing a super-hydrophobic and super-oleophilic polymeric sponge through a biological mineralization method. The preparation method includes the steps that polyethyleneimine, Ca2+ ions and sodium polystyrenesulfonate are attached to a sponge on multiple layers through electrostatic force, under the effect of polyethyleneimine and sodium polystyrenesulfonate, the Ca2+ ions and CO2 are induced for a gas phase mineralization reaction, thus, a coarse surface structure is provided for the polymeric sponge, finally low-surface-energy matter is used for surface modification, and then the super-hydrophobic and super-oleophilic polymeric sponge is obtained. The process is simple, the reaction conditions are mild, the adopted raw materials are cheap and easy to obtain, and the prepared sponge can selectively absorb floating oil on the water surface, can be compressed multiple times to be reused, and is a novel material expected to be applied to marine floating oil pollution treatment.

Description

technical field [0001] The invention relates to a method for preparing superhydrophobic polyurethane sponge by using a biomineralization method. Specifically, it relates to a polyurethane sponge with super-hydrophobic surface properties obtained by modifying a cheap and easy-to-obtain polyurethane sponge through a simple and gentle method. Background technique [0002] Oil pollution to the sea has become a global environmental problem. Oil floats on the sea surface and spreads rapidly to form an oil film. The oil can adhere to the gills of fish, suffocate fish and reduce the quality of aquatic products. The formation of oil film can hinder the reoxygenation of water body, affect the growth of marine plankton, and destroy the balance of marine ecology. In order to control marine oil slick pollution, various oil-absorbing materials have been put into use, among which super-hydrophobic and super-oleophilic polyurethane sponge has super-strong repellency to water and super-aff...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/40C08J9/42C09K3/32C08L75/04
CPCC08J9/40C08J9/42C08J2375/04C09K3/32
Inventor 杨娜张吕鸿徐立东杨华伟姜斌孙永利
Owner TIANJIN UNIV
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